Radioactivity

Front

What is Half-life in the context of radioactive isotopes?

Back

The amount of time it takes for half the nuclei in a sample of the isotope to decay.

Front

What does the symbol ⁴₂He represent?

Back

An alpha particle.

Front

What type of radioactive particle can be stopped by a sheet of paper?

Back

Alpha particle.

Front

What is the process called when the sun produces energy?

Back

Nuclear Fusion.

Front

What is the result of the alpha decay of ₈₅²⁰⁹At?

Back

₈₃²⁰⁵Bi.

Front

What is the definition of radioactive decay?

Back

The process by which an unstable atomic nucleus loses energy by emitting radiation.

Front

What are the three main types of radioactive decay?

Back

Alpha decay, beta decay, and gamma decay.

Front

What is a beta particle?

Back

A high-energy, high-speed electron or positron emitted during radioactive decay.

Front

What is gamma radiation?

Back

Electromagnetic radiation of high frequency and energy emitted from a radioactive nucleus.

Front

What is the difference between nuclear fission and nuclear fusion?

Back

Nuclear fission is the splitting of a heavy nucleus into smaller nuclei, while nuclear fusion is the combining of light nuclei to form a heavier nucleus.